当在某些类中无法通过@Autowired、@Resource这种注解的方式来创建bean时，我们首先可能想到可以通过加载配置文件的方式来获取bean，但这种方式不仅繁琐还容易因为路径问题个中找不到配置文件，所以我找到了一个很实用的工具，可以在项目中添加如下工具类：

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

@Component
public class SpringUtil implements ApplicationContextAware {

private static ApplicationContext applicationContext;@Overridepublic void setApplicationContext(ApplicationContext applicationContext) throws BeansException { if (SpringUtil.applicationContext == null) { SpringUtil.applicationContext = applicationContext; }}//获取applicationContextpublic static ApplicationContext getApplicationContext() { return applicationContext;}//通过name获取 Bean.public static Object getBean(String name) { ApplicationContext applicationContext = getApplicationContext(); if(null != applicationContext) { return getApplicationContext().getBean(name); } return null;}//通过class获取Bean.public static <T> T getBean(Class<T> clazz) { return getApplicationContext().getBean(clazz);}//通过name,以及Clazz返回指定的Beanpublic static <T> T getBean(String name, Class<T> clazz) { return getApplicationContext().getBean(name, clazz);}

}

如想获取配置文件中的sessionFactory对象
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="packagesToScan" value="com.kocla.market.gateway.entities"/>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop>
<!--<prop key="hibernate.hbm2ddl.auto">update</prop>-->
<prop key="hibernate.query.substitutions">true 'T', false 'F'</prop>
<prop key="hibernate.show_sql">false</prop>
<prop key="hibernate.connection.url">${bei.hibernate.connection.url}</prop>
<prop key="hibernate.connection.driver_class">com.mysql.jdbc.Driver</prop>
<prop key="hibernate.current_session_context_class">org.springframework.orm.hibernate4.SpringSessionContext</prop>
</props>
</property>
</bean>

可以通过以上工具类来轻松获取SpringUtil.getBean("sessionFactory");